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Old 21st November 2011, 09:40 PM   #1
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Join Date: Oct 2009
Default What test equip. do you use to tweek gain stages?

Curious what the audio gods use to tweak individual gain stage, I have resistor decade boxes, cap select boxes, custom 3 individual channel resistor/cap box for things like cathode resistor and bypass selection and monitor from my custom built electronic stethoscope. and of course my scope, this is of little use with dialing in a guitar amp gain stage.

Dummy load and electronic stethoscope
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The guts
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The Lab
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And of course the LAB anti-radiation-anti wife helmet
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Old 22nd November 2011, 09:33 AM   #2
DF96 is offline DF96  England
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I find a scientific calculator and data sheets are quite useful.
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Old 22nd November 2011, 08:36 PM   #3
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Originally Posted by DF96 View Post
I find a scientific calculator and data sheets are quite useful.
Yes . . . and a good circuit simulation program with trustworthy component models. If the prototype behaves like the simulator says it should, there's no need to play with the decade boxes. If not . . . the 'scope and function generator are the first tools used to find the source of the discrepancy.

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Old 22nd November 2011, 09:07 PM   #4
amptech is offline amptech  Scotland
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interesting collection of equipment... sometimes we build our own test gear and learn more from it than just buying it!

Years ago I used to service monster heavy duty amps and used cooker rings for test loads..
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Old 13th December 2011, 04:58 PM   #5
RevMen is offline RevMen  United States
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I used to have a Seasound Solo EX, with the expander. I loved the blue color. It's a shame they went out of business, that was good stuff.
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Old 14th December 2011, 08:58 PM   #6
tvrgeek is offline tvrgeek  United States
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I add my PC based spectrum analyzer, TrueRTA to about any measurement. Nothing I can afford beats it to see the effect on harmonic distortion. Really handy in tube circuits you are trying to balance.
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